If I were you I'd separate the wii and gcn. You'll probably get 100 - 150 for all of your wii related items and accessories.

And you'll probably get around the $80-$120 for your gcn games and accessories.

I'd highly recommend separating the sale. You are selling two completely different items. The wii being a casual thing any mum/idiot out there looking for games. And the gcn which is more of a speciality/retro item that only select people will be interested in.